6 3 6 8 2 5 July 8, 2019 16 32 64 128 6 3 8 2 5 9 6 3 4 8 2 5 3 6 x 1 2 7 8 6 5 6 3 8 2 5 ka madhyak hai 8 3 6 2 5 6 what is the mean